drivers/net/wireless/intel/iwlwifi/mvm/nvm.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2012-2014, 2018-2019, 2021-2024 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <linux/firmware.h>
   8 #include <linux/rtnetlink.h>
   9 #include "iwl-trans.h"
  10 #include "iwl-csr.h"
  11 #include "mvm.h"
  12 #include "iwl-nvm-utils.h"
  13 #include "iwl-nvm-parse.h"
  14 #include "iwl-prph.h"
  15 #include "fw/acpi.h"
  16
  17 /* Default NVM size to read */
  18 #define IWL_NVM_DEFAULT_CHUNK_SIZE (2 * 1024)
  19
  20 #define NVM_WRITE_OPCODE 1
  21 #define NVM_READ_OPCODE 0
  22
  23 /* load nvm chunk response */
  24 enum {
  25         READ_NVM_CHUNK_SUCCEED = 0,
  26         READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
  27 };
  28
  29 /*
  30  * prepare the NVM host command w/ the pointers to the nvm buffer
  31  * and send it to fw
  32  */
  33 static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
  34                                u16 offset, u16 length, const u8 *data)
  35 {
  36         struct iwl_nvm_access_cmd nvm_access_cmd = {
  37                 .offset = cpu_to_le16(offset),
  38                 .length = cpu_to_le16(length),
  39                 .type = cpu_to_le16(section),
  40                 .op_code = NVM_WRITE_OPCODE,
  41         };
  42         struct iwl_host_cmd cmd = {
  43                 .id = NVM_ACCESS_CMD,
  44                 .len = { sizeof(struct iwl_nvm_access_cmd), length },
  45                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
  46                 .data = { &nvm_access_cmd, data },
  47                 /* data may come from vmalloc, so use _DUP */
  48                 .dataflags = { 0, IWL_HCMD_DFL_DUP },
  49         };
  50         struct iwl_rx_packet *pkt;
  51         struct iwl_nvm_access_resp *nvm_resp;
  52         int ret;
  53
  54         ret = iwl_mvm_send_cmd(mvm, &cmd);
  55         if (ret)
  56                 return ret;
  57
  58         pkt = cmd.resp_pkt;
  59         /* Extract & check NVM write response */
  60         nvm_resp = (void *)pkt->data;
  61         if (le16_to_cpu(nvm_resp->status) != READ_NVM_CHUNK_SUCCEED) {
  62                 IWL_ERR(mvm,
  63                         "NVM access write command failed for section %u (status = 0x%x)\n",
  64                         section, le16_to_cpu(nvm_resp->status));
  65                 ret = -EIO;
  66         }
  67
  68         iwl_free_resp(&cmd);
  69         return ret;
  70 }
  71
  72 static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
  73                               u16 offset, u16 length, u8 *data)
  74 {
  75         struct iwl_nvm_access_cmd nvm_access_cmd = {
  76                 .offset = cpu_to_le16(offset),
  77                 .length = cpu_to_le16(length),
  78                 .type = cpu_to_le16(section),
  79                 .op_code = NVM_READ_OPCODE,
  80         };
  81         struct iwl_nvm_access_resp *nvm_resp;
  82         struct iwl_rx_packet *pkt;
  83         struct iwl_host_cmd cmd = {
  84                 .id = NVM_ACCESS_CMD,
  85                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
  86                 .data = { &nvm_access_cmd, },
  87         };
  88         int ret, bytes_read, offset_read;
  89         u8 *resp_data;
  90
  91         cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
  92
  93         ret = iwl_mvm_send_cmd(mvm, &cmd);
  94         if (ret)
  95                 return ret;
  96
  97         pkt = cmd.resp_pkt;
  98
  99         /* Extract NVM response */
 100         nvm_resp = (void *)pkt->data;
 101         ret = le16_to_cpu(nvm_resp->status);
 102         bytes_read = le16_to_cpu(nvm_resp->length);
 103         offset_read = le16_to_cpu(nvm_resp->offset);
 104         resp_data = nvm_resp->data;
 105         if (ret) {
 106                 if ((offset != 0) &&
 107                     (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
 108                         /*
 109                          * meaning of NOT_VALID_ADDRESS:
 110                          * driver try to read chunk from address that is
 111                          * multiple of 2K and got an error since addr is empty.
 112                          * meaning of (offset != 0): driver already
 113                          * read valid data from another chunk so this case
 114                          * is not an error.
 115                          */
 116                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 117                                          "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
 118                                          offset);
 119                         ret = 0;
 120                 } else {
 121                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 122                                          "NVM access command failed with status %d (device: %s)\n",
 123                                          ret, mvm->trans->name);
 124                         ret = -ENODATA;
 125                 }
 126                 goto exit;
 127         }
 128
 129         if (offset_read != offset) {
 130                 IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
 131                         offset_read);
 132                 ret = -EINVAL;
 133                 goto exit;
 134         }
 135
 136         /* Write data to NVM */
 137         memcpy(data + offset, resp_data, bytes_read);
 138         ret = bytes_read;
 139
 140 exit:
 141         iwl_free_resp(&cmd);
 142         return ret;
 143 }
 144
 145 static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
 146                                  const u8 *data, u16 length)
 147 {
 148         int offset = 0;
 149
 150         /* copy data in chunks of 2k (and remainder if any) */
 151
 152         while (offset < length) {
 153                 int chunk_size, ret;
 154
 155                 chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
 156                                  length - offset);
 157
 158                 ret = iwl_nvm_write_chunk(mvm, section, offset,
 159                                           chunk_size, data + offset);
 160                 if (ret < 0)
 161                         return ret;
 162
 163                 offset += chunk_size;
 164         }
 165
 166         return 0;
 167 }
 168
 169 /*
 170  * Reads an NVM section completely.
 171  * NICs prior to 7000 family doesn't have a real NVM, but just read
 172  * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
 173  * by uCode, we need to manually check in this case that we don't
 174  * overflow and try to read more than the EEPROM size.
 175  * For 7000 family NICs, we supply the maximal size we can read, and
 176  * the uCode fills the response with as much data as we can,
 177  * without overflowing, so no check is needed.
 178  */
 179 static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
 180                                 u8 *data, u32 size_read)
 181 {
 182         u16 length, offset = 0;
 183         int ret;
 184
 185         /* Set nvm section read length */
 186         length = IWL_NVM_DEFAULT_CHUNK_SIZE;
 187
 188         ret = length;
 189
 190         /* Read the NVM until exhausted (reading less than requested) */
 191         while (ret == length) {
 192                 /* Check no memory assumptions fail and cause an overflow */
 193                 if ((size_read + offset + length) >
 194                     mvm->trans->trans_cfg->base_params->eeprom_size) {
 195                         IWL_ERR(mvm, "EEPROM size is too small for NVM\n");
 196                         return -ENOBUFS;
 197                 }
 198
 199                 ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
 200                 if (ret < 0) {
 201                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 202                                          "Cannot read NVM from section %d offset %d, length %d\n",
 203                                          section, offset, length);
 204                         return ret;
 205                 }
 206                 offset += ret;
 207         }
 208
 209         iwl_nvm_fixups(mvm->trans->hw_id, section, data, offset);
 210
 211         IWL_DEBUG_EEPROM(mvm->trans->dev,
 212                          "NVM section %d read completed\n", section);
 213         return offset;
 214 }
 215
 216 static struct iwl_nvm_data *
 217 iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 218 {
 219         struct iwl_nvm_section *sections = mvm->nvm_sections;
 220         const __be16 *hw;
 221         const __le16 *sw, *calib, *regulatory, *mac_override, *phy_sku;
 222         u8 tx_ant = mvm->fw->valid_tx_ant;
 223         u8 rx_ant = mvm->fw->valid_rx_ant;
 224         int regulatory_type;
 225
 226         /* Checking for required sections */
 227         if (mvm->trans->cfg->nvm_type == IWL_NVM) {
 228                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 229                     !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
 230                         IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
 231                         return NULL;
 232                 }
 233         } else {
 234                 if (mvm->trans->cfg->nvm_type == IWL_NVM_SDP)
 235                         regulatory_type = NVM_SECTION_TYPE_REGULATORY_SDP;
 236                 else
 237                         regulatory_type = NVM_SECTION_TYPE_REGULATORY;
 238
 239                 /* SW and REGULATORY sections are mandatory */
 240                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 241                     !mvm->nvm_sections[regulatory_type].data) {
 242                         IWL_ERR(mvm,
 243                                 "Can't parse empty family 8000 OTP/NVM sections\n");
 244                         return NULL;
 245                 }
 246                 /* MAC_OVERRIDE or at least HW section must exist */
 247                 if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data &&
 248                     !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
 249                         IWL_ERR(mvm,
 250                                 "Can't parse mac_address, empty sections\n");
 251                         return NULL;
 252                 }
 253
 254                 /* PHY_SKU section is mandatory in B0 */
 255                 if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT &&
 256                     !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
 257                         IWL_ERR(mvm,
 258                                 "Can't parse phy_sku in B0, empty sections\n");
 259                         return NULL;
 260                 }
 261         }
 262
 263         hw = (const __be16 *)sections[mvm->cfg->nvm_hw_section_num].data;
 264         sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
 265         calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
 266         mac_override =
 267                 (const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
 268         phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
 269
 270         regulatory = mvm->trans->cfg->nvm_type == IWL_NVM_SDP ?
 271                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY_SDP].data :
 272                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
 273
 274         if (mvm->set_tx_ant)
 275                 tx_ant &= mvm->set_tx_ant;
 276
 277         if (mvm->set_rx_ant)
 278                 rx_ant &= mvm->set_rx_ant;
 279
 280         return iwl_parse_nvm_data(mvm->trans, mvm->cfg, mvm->fw, hw, sw, calib,
 281                                   regulatory, mac_override, phy_sku,
 282                                   tx_ant, rx_ant);
 283 }
 284
 285 /* Loads the NVM data stored in mvm->nvm_sections into the NIC */
 286 int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
 287 {
 288         int i, ret = 0;
 289         struct iwl_nvm_section *sections = mvm->nvm_sections;
 290
 291         IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
 292
 293         for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
 294                 if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
 295                         continue;
 296                 ret = iwl_nvm_write_section(mvm, i, sections[i].data,
 297                                             sections[i].length);
 298                 if (ret < 0) {
 299                         IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
 300                         break;
 301                 }
 302         }
 303         return ret;
 304 }
 305
 306 int iwl_nvm_init(struct iwl_mvm *mvm)
 307 {
 308         int ret, section;
 309         u32 size_read = 0;
 310         u8 *nvm_buffer, *temp;
 311         const char *nvm_file_C = mvm->cfg->default_nvm_file_C_step;
 312
 313         if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
 314                 return -EINVAL;
 315
 316         /* load NVM values from nic */
 317         /* Read From FW NVM */
 318         IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
 319
 320         nvm_buffer = kmalloc(mvm->trans->trans_cfg->base_params->eeprom_size,
 321                              GFP_KERNEL);
 322         if (!nvm_buffer)
 323                 return -ENOMEM;
 324         for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
 325                 /* we override the constness for initial read */
 326                 ret = iwl_nvm_read_section(mvm, section, nvm_buffer,
 327                                            size_read);
 328                 if (ret == -ENODATA) {
 329                         ret = 0;
 330                         continue;
 331                 }
 332                 if (ret < 0)
 333                         break;
 334                 size_read += ret;
 335                 temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
 336                 if (!temp) {
 337                         ret = -ENOMEM;
 338                         break;
 339                 }
 340
 341                 iwl_nvm_fixups(mvm->trans->hw_id, section, temp, ret);
 342
 343                 mvm->nvm_sections[section].data = temp;
 344                 mvm->nvm_sections[section].length = ret;
 345
 346 #ifdef CONFIG_IWLWIFI_DEBUGFS
 347                 switch (section) {
 348                 case NVM_SECTION_TYPE_SW:
 349                         mvm->nvm_sw_blob.data = temp;
 350                         mvm->nvm_sw_blob.size  = ret;
 351                         break;
 352                 case NVM_SECTION_TYPE_CALIBRATION:
 353                         mvm->nvm_calib_blob.data = temp;
 354                         mvm->nvm_calib_blob.size  = ret;
 355                         break;
 356                 case NVM_SECTION_TYPE_PRODUCTION:
 357                         mvm->nvm_prod_blob.data = temp;
 358                         mvm->nvm_prod_blob.size  = ret;
 359                         break;
 360                 case NVM_SECTION_TYPE_PHY_SKU:
 361                         mvm->nvm_phy_sku_blob.data = temp;
 362                         mvm->nvm_phy_sku_blob.size  = ret;
 363                         break;
 364                 case NVM_SECTION_TYPE_REGULATORY_SDP:
 365                 case NVM_SECTION_TYPE_REGULATORY:
 366                         mvm->nvm_reg_blob.data = temp;
 367                         mvm->nvm_reg_blob.size  = ret;
 368                         break;
 369                 default:
 370                         if (section == mvm->cfg->nvm_hw_section_num) {
 371                                 mvm->nvm_hw_blob.data = temp;
 372                                 mvm->nvm_hw_blob.size = ret;
 373                                 break;
 374                         }
 375                 }
 376 #endif
 377         }
 378         if (!size_read)
 379                 IWL_ERR(mvm, "OTP is blank\n");
 380         kfree(nvm_buffer);
 381
 382         /* Only if PNVM selected in the mod param - load external NVM  */
 383         if (mvm->nvm_file_name) {
 384                 /* read External NVM file from the mod param */
 385                 ret = iwl_read_external_nvm(mvm->trans, mvm->nvm_file_name,
 386                                             mvm->nvm_sections);
 387                 if (ret) {
 388                         mvm->nvm_file_name = nvm_file_C;
 389
 390                         if ((ret == -EFAULT || ret == -ENOENT) &&
 391                             mvm->nvm_file_name) {
 392                                 /* in case nvm file was failed try again */
 393                                 ret = iwl_read_external_nvm(mvm->trans,
 394                                                             mvm->nvm_file_name,
 395                                                             mvm->nvm_sections);
 396                                 if (ret)
 397                                         return ret;
 398                         } else {
 399                                 return ret;
 400                         }
 401                 }
 402         }
 403
 404         /* parse the relevant nvm sections */
 405         mvm->nvm_data = iwl_parse_nvm_sections(mvm);
 406         if (!mvm->nvm_data)
 407                 return -ENODATA;
 408         IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n",
 409                          mvm->nvm_data->nvm_version);
 410
 411         return ret < 0 ? ret : 0;
 412 }
 413
 414 struct iwl_mcc_update_resp_v8 *
 415 iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
 416                    enum iwl_mcc_source src_id)
 417 {
 418         struct iwl_mcc_update_cmd mcc_update_cmd = {
 419                 .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]),
 420                 .source_id = (u8)src_id,
 421         };
 422         struct iwl_mcc_update_resp_v8 *resp_cp;
 423         struct iwl_rx_packet *pkt;
 424         struct iwl_host_cmd cmd = {
 425                 .id = MCC_UPDATE_CMD,
 426                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 427                 .data = { &mcc_update_cmd },
 428         };
 429
 430         int ret, resp_ver;
 431         u32 status;
 432         int resp_len, n_channels;
 433         u16 mcc;
 434
 435         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 436                 return ERR_PTR(-EOPNOTSUPP);
 437
 438         cmd.len[0] = sizeof(struct iwl_mcc_update_cmd);
 439
 440         IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n",
 441                       alpha2[0], alpha2[1], src_id);
 442
 443         ret = iwl_mvm_send_cmd(mvm, &cmd);
 444         if (ret)
 445                 return ERR_PTR(ret);
 446
 447         pkt = cmd.resp_pkt;
 448
 449         resp_ver = iwl_fw_lookup_notif_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP,
 450                                            MCC_UPDATE_CMD, 0);
 451
 452         /* Extract MCC response */
 453         if (resp_ver >= 8) {
 454                 struct iwl_mcc_update_resp_v8 *mcc_resp_v8 = (void *)pkt->data;
 455
 456                 n_channels =  __le32_to_cpu(mcc_resp_v8->n_channels);
 457                 if (iwl_rx_packet_payload_len(pkt) !=
 458                     struct_size(mcc_resp_v8, channels, n_channels)) {
 459                         resp_cp = ERR_PTR(-EINVAL);
 460                         goto exit;
 461                 }
 462                 resp_len = struct_size(resp_cp, channels, n_channels);
 463                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 464                 if (!resp_cp) {
 465                         resp_cp = ERR_PTR(-ENOMEM);
 466                         goto exit;
 467                 }
 468                 resp_cp->status = mcc_resp_v8->status;
 469                 resp_cp->mcc = mcc_resp_v8->mcc;
 470                 resp_cp->cap = mcc_resp_v8->cap;
 471                 resp_cp->source_id = mcc_resp_v8->source_id;
 472                 resp_cp->time = mcc_resp_v8->time;
 473                 resp_cp->geo_info = mcc_resp_v8->geo_info;
 474                 resp_cp->n_channels = mcc_resp_v8->n_channels;
 475                 memcpy(resp_cp->channels, mcc_resp_v8->channels,
 476                        n_channels * sizeof(__le32));
 477         } else if (fw_has_capa(&mvm->fw->ucode_capa,
 478                                IWL_UCODE_TLV_CAPA_MCC_UPDATE_11AX_SUPPORT)) {
 479                 struct iwl_mcc_update_resp_v4 *mcc_resp_v4 = (void *)pkt->data;
 480
 481                 n_channels =  __le32_to_cpu(mcc_resp_v4->n_channels);
 482                 if (iwl_rx_packet_payload_len(pkt) !=
 483                     struct_size(mcc_resp_v4, channels, n_channels)) {
 484                         resp_cp = ERR_PTR(-EINVAL);
 485                         goto exit;
 486                 }
 487                 resp_len = struct_size(resp_cp, channels, n_channels);
 488                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 489                 if (!resp_cp) {
 490                         resp_cp = ERR_PTR(-ENOMEM);
 491                         goto exit;
 492                 }
 493
 494                 resp_cp->status = mcc_resp_v4->status;
 495                 resp_cp->mcc = mcc_resp_v4->mcc;
 496                 resp_cp->cap = cpu_to_le32(le16_to_cpu(mcc_resp_v4->cap));
 497                 resp_cp->source_id = mcc_resp_v4->source_id;
 498                 resp_cp->time = mcc_resp_v4->time;
 499                 resp_cp->geo_info = mcc_resp_v4->geo_info;
 500                 resp_cp->n_channels = mcc_resp_v4->n_channels;
 501                 memcpy(resp_cp->channels, mcc_resp_v4->channels,
 502                        n_channels * sizeof(__le32));
 503         } else {
 504                 struct iwl_mcc_update_resp_v3 *mcc_resp_v3 = (void *)pkt->data;
 505
 506                 n_channels =  __le32_to_cpu(mcc_resp_v3->n_channels);
 507                 if (iwl_rx_packet_payload_len(pkt) !=
 508                     struct_size(mcc_resp_v3, channels, n_channels)) {
 509                         resp_cp = ERR_PTR(-EINVAL);
 510                         goto exit;
 511                 }
 512                 resp_len = struct_size(resp_cp, channels, n_channels);
 513                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 514                 if (!resp_cp) {
 515                         resp_cp = ERR_PTR(-ENOMEM);
 516                         goto exit;
 517                 }
 518
 519                 resp_cp->status = mcc_resp_v3->status;
 520                 resp_cp->mcc = mcc_resp_v3->mcc;
 521                 resp_cp->cap = cpu_to_le32(mcc_resp_v3->cap);
 522                 resp_cp->source_id = mcc_resp_v3->source_id;
 523                 resp_cp->time = mcc_resp_v3->time;
 524                 resp_cp->geo_info = mcc_resp_v3->geo_info;
 525                 resp_cp->n_channels = mcc_resp_v3->n_channels;
 526                 memcpy(resp_cp->channels, mcc_resp_v3->channels,
 527                        n_channels * sizeof(__le32));
 528         }
 529
 530         status = le32_to_cpu(resp_cp->status);
 531
 532         mcc = le16_to_cpu(resp_cp->mcc);
 533
 534         /* W/A for a FW/NVM issue - returns 0x00 for the world domain */
 535         if (mcc == 0) {
 536                 mcc = 0x3030;  /* "00" - world */
 537                 resp_cp->mcc = cpu_to_le16(mcc);
 538         }
 539
 540         IWL_DEBUG_LAR(mvm,
 541                       "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') n_chans: %d\n",
 542                       status, mcc, mcc >> 8, mcc & 0xff, n_channels);
 543
 544 exit:
 545         iwl_free_resp(&cmd);
 546         return resp_cp;
 547 }
 548
 549 int iwl_mvm_init_mcc(struct iwl_mvm *mvm)
 550 {
 551         bool tlv_lar;
 552         bool nvm_lar;
 553         int retval;
 554         struct ieee80211_regdomain *regd;
 555         char mcc[3];
 556
 557         if (mvm->cfg->nvm_type == IWL_NVM_EXT) {
 558                 tlv_lar = fw_has_capa(&mvm->fw->ucode_capa,
 559                                       IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 560                 nvm_lar = mvm->nvm_data->lar_enabled;
 561                 if (tlv_lar != nvm_lar)
 562                         IWL_INFO(mvm,
 563                                  "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n",
 564                                  tlv_lar ? "enabled" : "disabled",
 565                                  nvm_lar ? "enabled" : "disabled");
 566         }
 567
 568         if (!iwl_mvm_is_lar_supported(mvm))
 569                 return 0;
 570
 571         /*
 572          * try to replay the last set MCC to FW. If it doesn't exist,
 573          * queue an update to cfg80211 to retrieve the default alpha2 from FW.
 574          */
 575         retval = iwl_mvm_init_fw_regd(mvm, true);
 576         if (retval != -ENOENT)
 577                 return retval;
 578
 579         /*
 580          * Driver regulatory hint for initial update, this also informs the
 581          * firmware we support wifi location updates.
 582          * Disallow scans that might crash the FW while the LAR regdomain
 583          * is not set.
 584          */
 585         mvm->lar_regdom_set = false;
 586
 587         regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 588         if (IS_ERR_OR_NULL(regd))
 589                 return -EIO;
 590
 591         if (iwl_mvm_is_wifi_mcc_supported(mvm) &&
 592             !iwl_bios_get_mcc(&mvm->fwrt, mcc)) {
 593                 kfree(regd);
 594                 regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc,
 595                                              MCC_SOURCE_BIOS, NULL);
 596                 if (IS_ERR_OR_NULL(regd))
 597                         return -EIO;
 598         }
 599
 600         retval = regulatory_set_wiphy_regd_sync(mvm->hw->wiphy, regd);
 601         kfree(regd);
 602         return retval;
 603 }
 604
 605 void iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm,
 606                                 struct iwl_rx_cmd_buffer *rxb)
 607 {
 608         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 609         struct iwl_mcc_chub_notif *notif = (void *)pkt->data;
 610         enum iwl_mcc_source src;
 611         char mcc[3];
 612         struct ieee80211_regdomain *regd;
 613         int wgds_tbl_idx;
 614         bool changed = false;
 615
 616         lockdep_assert_held(&mvm->mutex);
 617
 618         if (iwl_mvm_is_vif_assoc(mvm) && notif->source_id == MCC_SOURCE_WIFI) {
 619                 IWL_DEBUG_LAR(mvm, "Ignore mcc update while associated\n");
 620                 return;
 621         }
 622
 623         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 624                 return;
 625
 626         mcc[0] = le16_to_cpu(notif->mcc) >> 8;
 627         mcc[1] = le16_to_cpu(notif->mcc) & 0xff;
 628         mcc[2] = '\0';
 629         src = notif->source_id;
 630
 631         IWL_DEBUG_LAR(mvm,
 632                       "RX: received chub update mcc cmd (mcc '%s' src %d)\n",
 633                       mcc, src);
 634         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src, &changed);
 635         if (IS_ERR_OR_NULL(regd))
 636                 return;
 637
 638         if (!changed) {
 639                 IWL_DEBUG_LAR(mvm, "RX: No change in the regulatory data\n");
 640                 goto out;
 641         }
 642
 643         wgds_tbl_idx = iwl_mvm_get_sar_geo_profile(mvm);
 644         if (wgds_tbl_idx < 1)
 645                 IWL_DEBUG_INFO(mvm,
 646                                "SAR WGDS is disabled or error received (%d)\n",
 647                                wgds_tbl_idx);
 648         else
 649                 IWL_DEBUG_INFO(mvm, "SAR WGDS: geo profile %d is configured\n",
 650                                wgds_tbl_idx);
 651
 652         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 653
 654 out:
 655         kfree(regd);
 656 }